1 / 18

Workflow in Grid Systems Workshop

Workflow in Grid Systems Workshop. Dave Berry, Research Manager UK National e-Science Centre GGF10, Mar 2004. Outline: Welcome. Welcome Aims Programme “E-Science Workflow Services” Background Structure Issues arising. Aims. Report on current work Find areas of agreement

Download Presentation

Workflow in Grid Systems Workshop

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Workflow in Grid Systems Workshop Dave Berry, Research Manager UK National e-Science Centre GGF10, Mar 2004

  2. Outline: Welcome • Welcome • Aims • Programme • “E-Science Workflow Services” • Background • Structure • Issues arising

  3. Aims • Report on current work • Find areas of agreement • Identify open issues • Look for opportunities • Research • Development • Collaboration • Outcomes • Sample workflows • CP&E special issue • Input to RGs and WGs ?

  4. Morning Session • Talks • Architecture • Applications • Possible panel topics: • Scripting • Security • Debugging • Constraint Modelling • Discussion • Issues

  5. Afternoon session • Talks • Languages (esp. BPEL) • Tools & Enactment • Possible panel topics: • Adaptive enactment • Workflow inference • Event-driven enactment • Incorporating devices & human input • Discussion • Outcomes

  6. Outline:“E-Science Workflow Services” • Welcome • Aims • Programme • “E-Science Workflow Services” • Background • Structure • Issues arising

  7. E-Science Workflow Services • > 90 participants • Industry • UK e-Science • International e-Science • Organisers • Dave Berry (NeSC) • Savas Parastatidis (NEReSC) • Written report • In progress • UK e-Science Series December 3-5, 2003

  8. e-Science Institute e-Science Institute

  9. Speakers • Industry • WfMC, WS-Choreography • UK e-Science • MyGrid/Taverna, GeoDise, DiscoveryNet, DAME, ICENI, Planning, RealityGrid, JIGSA, OGSA-DAI, Triana, AstroGrid • International e-Science • Chimera/Pegasus, BIRN, Kepler/Ptolemy, Thetis, Narada • Research • Operational research, Workflow and VO’s

  10. Breakout Sessions • Scientific Workflow Requirements • Carole Goble • Protocols in Scientific Workflows • John Brooke • Workflow Languages and Engines • Matthew Addis

  11. User requirements • Reflect the modelling paradigm of the scientist. • Varies between experiments, disciplines • Which user would that be? • Creators, users, auditors, validators (I know if its right when I see it) • Biologists cf. bioinformaticians, and transitioning between • Different users, different environments • Appropriate levels of abstraction. • User models -> workflow models • Simple to use & intuitive creation, deployment, execution and debugging environments

  12. A Scientist Writes… “Work in my problem solving environment so that I don’t need to change the way I work.”

  13. Scientific Workflow lifecycles • Incrementally exploratory prototypes • Got the data, now get the Nature paper before the next guy • Large scale production • Got the idea, now get the data for many experiments, teams, communities • Migration from one to the other • Capture of prototype for later non-interactive replay in a parameterised fashion • Different parts of the lifecycle • May use different environments and policies • Different sorts of users will interact

  14. User interaction • Creation & Discovery • By example, plagiarism, drag and drop • Collaborative multi-user interaction in creation • Reusing workflows -> modularisation • Reusing workflows with different parameters and data • Composing workflows from different areas, disciplines and scales • “eXtreme team workflow creation” • Single User interaction with workflow execution • Choice between paths of execution in specific states • Parameter modification mid-run • Collaborative multi-user interaction during execution?

  15. Characterising Scientific Workflows • Very large amounts of data • Files, streams, database queries • GridFTP, http, ftp, sockets … • Sometimes it's the computation that needs to be moved to the data • Data model and types • Metadata • Provenance • Drivers • Scientific questions, outcomes and vanity • More creators than users in science?

  16. Enactment Stack

  17. Workflow vs. Service “Perform” document Result of query 1 Stored procedure OGSA-DAI Service Transformed result of query 2

  18. Questions? daveb@nesc.ac.uk Presentations from the workshop: http://www.nesc.ac.uk/action/esi/contribution.cfm?Title=303

More Related